A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 9550800 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 25 28 30 35 36 40 42 45 48 50 56 60 63 70 72 75 80 84 90 100 105 112 120 126 140 144 150 168 175 180 200 210 225 240 252 280 300 315 336 350 360 379 400 420 450 504 525 560 600 630 700 720 758 840 900 1,008 1,050 1,137 1,200 1,260 1,400 1,516 1,575 1,680 1,800 1,895 2,100 2,274 2,520 2,653 2,800 3,032 3,150 3,411 3,600 3,790 4,200 4,548 5,040 5,306 5,685 6,064 6,300 6,822 7,580 7,959 8,400 9,096 9,475 10,612 11,370 12,600 13,265 13,644 15,160 15,918 17,055 18,192 18,950 21,224 22,740 23,877 25,200 26,530 27,288 28,425 30,320 31,836 34,110 37,900 39,795 42,448 45,480 47,754 53,060 54,576 56,850 63,672 66,325 68,220 75,800 79,590 85,275 90,960 95,508 106,120 113,700 119,385 127,344 132,650 136,440 151,600 159,180 170,550 191,016 198,975 212,240 227,400 238,770 265,300 272,880 318,360 341,100 382,032 397,950 454,800 477,540 530,600 596,925 636,720 682,200 795,900 955,080 1,061,200 1,193,850 1,364,400 1,591,800 1,910,160 2,387,700 3,183,600 4,775,400 and 9,550,800, with no remainder.
Since 9,550,800 cannot be divided by just 1 and 9,550,800, it is not a prime number.